<div>
  <mat-toolbar class="df jcsb">
    <div>eh</div>
    <button mat-button (click)="doLogout()">退出</button>
  </mat-toolbar>
  <mat-toolbar color="primary">
    <button mat-icon-button>
      <mat-icon>menu</mat-icon>
    </button>
    <!-- <ng-content></ng-content> -->
  </mat-toolbar>
</div>